# Author: Aman Narang

In the Hexadecimal number often shortened “hex”, is a number system which is made up of 16 symbols it means the base of this number system is 16.

The standard number system is called decimal number system; it uses 10 symbols for representation and the 10 symbols are 0,1,2,3,4,5,6,7,8,9. That means in decimal number system the base is 10. Using this number system we can’t represent values greater than 9. In hexadecimal number system letters taken from English alphabet, specifically A, B, C, D, E and F. Hexadecimal “A” represent the decimal number 10, and hexadecimal “ F” is equal to the decimal number 15.

Humans mostly use decimal number probably because of having ten fingers on their hand. But computer however have only on and off, called a binary digit. A binary number is just combination of 0s and 1s.

Hexadecimal number is mostly similar to the octal number system. This number system uses four-bit binary coding. It means each digit in hexadecimal number is the same as four digit binary number.

In the decimal number system, the first digit is the one’s place, the next digit to the left of first digit is the ten’s place, the next is the hundred’s place, etc. But in hexadecimal number system, each digit can be 16 values, not 10. So we can say the digits have the one’s place, the sixteen’s place, and the next one is the 256’s place. So 1hexadecimal = 1 decimal, 10hexadecimal = 16 decimal, and 100hexadecimal = 256 in decimal.

 Hex Binary Octal Decimal 0 0 0 0 1 1 1 1 2 10 2 2 3 11 3 3 4 100 4 4 5 101 5 5 6 110 6 6 7 111 7 7 8 1000 10 8 9 1001 11 9 A 1010 12 10 B 1011 13 11 C 1100 14 12 D 1101 15 13 E 1110 16 14 F 1111 17 15 10 1 0000 20 16 11 1 0001 21 17 24 10 0100 44 36 5E 101 1110 136 94 100 1 0000 0000 400 256 3E8 11 1110 1000 1750 1000 1000 1 0000 0000 0000 10000 4096 FACE 1111 1010 1100 1110 175316 64206

### Hexadecimal to decimal conversion

There are two common ways to convert a number from hexadecimal numbers to decimal, there are two common ways.

The first approach is more ordinarily done when it is manually conversion:

1. At first have to use the decimal value for each hexadecimal digit. It is the same for the number 0 to 9, but the values of A, B, C, D, E, F are 10, 11, 12, 13, 14, 15 respectively.
2. Keep a sum of the products changed at each step below.
3. Start with the least significant hexadecimal digit, digit on the right end. In a sum this will be the first item. This item will be the first item in a sum.
4. Take the second-least significant digit, next to the digit on the right end. Multiply the decimal number digit by 16. Add the number to the sum.
5. Do the same for the third-least vital digit, but multiply it by 162 (that is, 16 squared, or 256). Add it to the sum.
6. Continue for each digit, adding each place by another power of 16. (4096, 65536, etc.)
 Location 5 4 3 2 1 Value 65536 (164) 4096 (163) 256 (162) 16(161) 1 (160)

In the time converting a number in software the next method is more commonly done. It does not require to know how many numbers has before when it starts, and it never multiplies by more than 16, but it looks longer on paper.

1. At first have to use the decimal value for each hexadecimal digit. It is the same for the number 0 to 9, but the values of A, B, C, D, E,F are 10, 11, 12, 13, 14, 15 respectively
2. Keep a sum of the numbers changed at each step below.
3. Start among the various important digit (the digit on the far left). This is the first item in the sum.
4. If there is another digit, multiply the sum by 16 and then add the decimal value of the next digit.
5. Repeat the high step until there are no more digits.

Example: 5F hexadecimal to decimal, method 1

(5F)16 = (5 x 16) + (15 x 1)

= 80 + 15

= (95)10

Example: 5F hexadecimal to decimal, method 2

Sum= (5 x 16) + 15

= 80 + 15

= (95)10

### Binary to Hexadecimal conversion

There are some steps for converting one binary number system to hexadecimal number system:-

1. At first we have to underline each pair of the digits from right side to left. If any bit is left in the left side of the digit this will be the last set of pair.
2. After that convert the each 4 digit set in to equivalent hexadecimal number.
3. Then rewrite the digit which we get after the conversion.

Example: Convert (1010010100)2 to equivalent hexadecimal number.

0010 1000 0100

2 8 4

Ans. (284)16

The major advantage of using Hexadecimal numbers is that we can store more numbers using less memory. Hexadecimal number system is also used to representing the Computer memory addresses. In hexadecimal form inputs and outputs are easier to handle. In data science field, artificial intelligence and machine learning the advantage is wide.

The major disadvantage is that it is not easy to read and write for people, and it is difficult to perform operations like multiplications, divisions using this number system.…

Everyone faces problems like power-cut in their day-to-day lives. It is not surprising that we all have been in a situation where there is no electricity in the house and there is darkness all around you. Or you went out for hiking or trekking and you obviously don’t have LEDs around you to create light.

Finding yourself in that situation makes one feel very helpless. In conditions like these, you need a torchlight with you. It has been an underrated tool since the usage of mobile phones but they are an essential tool. Whether it is a part of your travel-kit or it is for recurring power-cuts, one must possess a good torchlight to use in an emergency. These amazing kits are a perfect combo for you to take out that you want. If you want to stay away from the dark then you can have this amazing part for yourself and it can completely work out for you and in the right way since these are the amnesties which you completely need for yourself all the time.

Buying a torch is not as easy as it seems. There are a lot of options available in the market that could lead you to confusion. So, in this article, you will find some of the best torch light options with their pros and cons that will help you decide better:

### Havells Ranger 30 3-Watt Rechargeable LED Torch:

This torchlight is not only attractive in terms of looks but also has great efficiency. The 3-Watt LED torch is apt while walking on shady pathways.

#### Pros

• Takes less battery while usage
• Attractive and sleek design
• LED light for better illumination
• Strong and durable ABS body

#### Cons

• Low beam torch, not preferred by everyone

### Voroly 2000 High Lumen Tactical LED Flashlight:

Even though it is a mid-range product, Voroly 2000 comes with a lot of special features. The product provides a focused beam light for a long-range and is suitable for any kind of outdoor activity.

#### Pros

• Water-resistant torch
• Has LED light for better lighting
• Comes with 5 different light modes
• Strong and durable built
• Has 6 months warranty with it
• Comes with the battery charger

#### Cons

• Not suitable for wide-angle usage
• Not a very good battery backup

### Wipro Lifelite CL0004 3-Watt Rechargeable LED Torch:

This torch by Wipro is also a good option to go for. The product illuminates the area within its reach with precision. The design and strength of the torch are also very good.

#### Pros

• Over-charge protection feature to make it more durable
• Heavy-duty torch gives a work-time of up to 7 hours
• Deep-charging mode available
• Precise and powerful white light
• Comes with a 6-month warranty

#### Cons

• Takes 24 hours to recharge completely

### Qualimate Rechargeable Aluminum Alloy LED Zoom-able Flashlight:

If you are looking for a torch with a good battery backup, then this Qualimate flashlight could be the one you are looking for. The torch is of small size and is quite handy.

#### Pros

• Portable in size
• Comes with a strap to make it easy to carry
• A huge battery life
• Waterproof as well as shock-resistant
• Provides a good brightness
• Pocket-friendly price
• Comes with a charger

#### Cons

• No warranty included
• The charger is not much durable

### Eveready DL92 0.5-Watt Ultra LED Rechargeable Torch:

If you are searching for thinner torch options, then this flashlight from Eveready is apt for you. It proves to work excellent for home-usage. But it is equally efficient for outside usage too.

#### Pros

• It gives an operation time of up to 4 hours
• Comes with two different light modes
• Comes in an affordable price range
• Easy to use
• Sturdy and durable plastic body

#### Cons

• Takes time to recharge completely

### DOCOSS-ABS 25 Watt Ultra Bright Waterproof Rechargeable Flashlight:

This torchlight was made for emergency purposes. It could turn out to be a good tool in times of emergencies. The design is very simple and user-friendly. But the built is durable and sturdy.

#### Pros

• Easy to use
• High efficiency
• 5 Watt battery for better illumination
• Two different modes of light

#### Cons

• The plug that comes with the torch is not easy to deal with

### Havells Beemer 50 5-Watt LED Torch:

This torchlight is one of those flashlights that provide a good battery life. It is a multi-purpose flashlight that comes with a light-weight, durable body.

#### Pros

• Long-lasting battery life
• Light body design
• Pocket-friendly
• 2 light modes available
• Comes with a warranty period of 6 months

#### Cons

• It has a low beam light, might not be preferable for everyone.

### SHOPEE Branded Waterproof Ultra Bright:

If you want a torchlight that not only has a great appearance but also has brilliant lighting, then this flashlight might be it for you.

#### Pros

• Has a bright LED light for better illumination
• Comes with a clear diffuser
• Has a sturdy ABS body
• Good battery efficiency

#### Cons

• Has a low beam light, might not be suitable for everyone

### Voroly Solar Torch Light:

This flashlight comes with a lot of unique features. It is suitable for camping and trekking purposes. The torch comes with a power bank that could help you charge your phone too.

#### Pros

• Comes with an emergency tool, could be used as a hammer for self-defense.
• Solar charging
• Intensified light up to 700 feet.
• Can be used as a power bank too
• Attractive design

#### Cons

• Battery life is not very long

Doesn’t it hurt to leave your warm bed every morning and rush to the office? Those hard and stiff chair doesn’t make you uncomfortable? No, you don’t need to resign from your work. All your boss needs to do is to replace the hard and stiff chairs with soft and comfortable office chairs. And then the miracle begins!! It is very painful to sit for a long period of time and constantly working. And if the chair is stiff, then it adds more to the suffering. But is universally proven that there is no problem without a solution. And the solution to this aching issue is to replace tough and rigid chairs with soft and fluffy office chairs.

### Importance of Good Office Chairs

On average, usually, people spend working 10 hours sitting on the chair in the office. The work seems uncomfortable if the quality of the office chair is not good. Here are some reasons why good office chairs are important:-

1. Support:- A good office chair has a modifiable back that shapes to the curves of the lower back flawlessly. It prevents a person from slouching.
2. Seat Material:- Fluffy, cushion pads are recommended for office chairs rather than hard and tough material. It prevents discomfort for the person sitting in the chair.
3. Height of the seat:- The seat height should be perfectly positioned. The feet should be relaxing on the floor and thighs resting horizontally.
4. Armrest:- The good office chair has an armrest for positioning arms and shoulders. It helps in resting arms properly without causing severe pain to the elbow. However, while typing or writing, the hand should not be resting.
5. Twirling feature:- A good office chair has a twirl feature designed. The chair can easily turn around the areas of the desk. The person does not need to drag the chair to each and every place causing noise pollution in the office and also a pain in the hands. With the help of wheels, the chair can be easily moved from one place to another silently.

### Health problems due to sitting on Hard Chairs

Any kind of pain related to the body of a human directly affects the internal body parts of the body. The human body is a very complex structured and well-organised body. All the body parts and interconnected to each other directly or indirectly. The posture of the body while doing any activity directly affects the bones. The body’s posture while sitting on a hard and tough chair may lead to so many health issues. Some of the issues caused by sitting on hard chairs are mentioned below:-

1. Back Pain:- Sitting for a longer period of time on a hard surface can undoubtedly cause severe back pain. In some cases, it may also worsen the existing back pain issues.
2. Muscle strain:- It happens when a person over-stretches the body so many times. It is also called Lumbar strain. Due to muscular strain in the lower back, the back becomes very stiff and hard to move. A person can recover from it within 4-5 weeks but if the body posture while sitting continues to be irregular then the pain may increase with the increase in age.
3. Sciatica:- It refers to pain in the sciatic nerve, which runs down the root of the spine into the back of the legs. Initially, the pain feels like an aching sensation but later it feels like an electric shock. Sitting for long periods can worsen the condition of the pain.

### Types of Office Chairs

There are so many chairs available in the market according to the requirements. Some of the types of office chairs are discussed below:-

1. 24 Hour Chairs:- As the name suggests, this chair is designed for constant use. The endless use of this chair is assured by the manufacturer by designing it with extra durable frames, thickly padded seats and backs.
2. Conference Chairs:- These types of chairs have been designed especially for the conference purpose. The forward-leaning design helps the person to show their more interest and engagement in the meeting.
3. Ergonomic chairs:- These chairs are designed with many adjustments so as to fully support many individuals. Some of these important adjustments include seat depth, seat height, back height and lumbar support.
4. Love seats:- It is basically a thickly padded sofa set which accommodates 2 people at a time. It is usually used to conduct informal meetings with guests.
5. Tablet arm Chairs:- These kinds of chairs are often used in educational institutes or offices. It has a small board attached to the chair for writing purpose or making notes comfortably.
6. Computer Chairs:- As the name suggests, computer chairs are specifically designed to adjust to the computer desk. It can also, be customized according to the requirement.

Hence, it is crystal clear why good office chair is necessary for official work. There are so many chairs available in the market but the specific features of all the chairs should be kept in mind before purchasing it. Every chair has been designed for some specific purpose. If you work continuously for a longer period of time then you should go for 24-hour chair and if you don’t work for a long period of time then the chair should be purchased accordingly. Now, if your office workers feel uncomfortable while sitting in their chairs then immediately you should replace their stiff chairs with the fluffy one.…

Bluetooth is a high-speed wireless technology developed to link two phones to each other or to other portable devices with optimal work. The Bluetooth technology is extremely helpful in making cell-phones more functional. It has made many electronic parts wireless and outweighs the utility and practicality of infrared. The wireless ear bud sets further complement the features provided by the technology. They allow hands-free conversations on the phone which makes for the Unique Selling Point of the product.

Bluetooth technology is a modern, global standard for wireless services. As more users have started using the Bluetooth technology, more companies are making their goods compliant with it, making it a wireless default. Given the busy roads and incessant traffic in India, the need for wireless and handy ear plugs becomes necessary. There are innumerable benefits of using Bluetooth earphones. Following is a complete prospectus listing a few of the benefits of using these.

The first and the most significant benefit of using them springs from the fact that they are wireless. This implies that there are no wires swaying everywhere which makes it a distinct feature as we are all tired of untangling our earphones, aren’t we?

### It comes with a ton of advantages

The next advantage is a mere continuation of the one above. This wirelessness offers us the scope of absolute mobility. We can be cord-free and hands-free without a care in the world. The ear buds do not have to fall off every time it incidentally collides with another object. No matter what we do, the wireless feature of the earphone will help us do it easily without any hassles or worrying about breaking the chord.

When two or more Bluetooth devices are within the range of around 30 feet, they automatically get connected. The mobile phone can remain untouched inside the pocket. Further, it does not necessarily have to be inside the pocket. Keeping it in the range of Bluetooth would suffice.

### It is about talking in the phone rightly

Another feature that can be seen on the in-ear Bluetooth headset includes answering and talking on the mobile phone. Most of the mobile phone tasks can further be performed without even touching the mobile phone. Controlling these earphones, is further an extremely simple task. You can skip songs or change them, adjust the sound and even take calls with just a button on the headset.

Another advantage is the fact that Bluetooth uses low power signals. This implies that it uses comparatively lesser battery to use Bluetooth earphones than regular ones. This is an exceptionally good advantage for all android phones because Bluetooth will not drain the battery. The busy roads in India sometimes pave the way for huge waiting periods. A person can now be waiting in the middle of the road, sitting in the comfort of their cars, listening to songs on their phones without getting disturbed or having to get worried about their phones getting switched off.

### Helps in better regulation

The next advantage is how visually appealing it looks to be wearing a wireless headset. They can make you look trendy and ultra-stylish. The modern look it gives you further helps you make a style statement.

The sleek design of the earphone makes it more comfortable as it gets positioned appropriately around the ears. They are convenient and have to be inserted inside the ears.

### It is the new future

Further, the wireless feature of the Bluetooth earplugs makes it a very inclusive one. Have you ever wondered about someone with a broken arm or no arm at all?

The next benefit is that when you do an activity like cycling, cooking, or even walking while talking to someone- you tend to focus more on the activity than keeping the phone plastered to your ear.

### Amazing piece for your phone

Another feature is that it allows you to set both your hands free. Thus, you can continue working while someone puts you on hold. You do not have to catch the phone on one hand and wait. The work goes on! Thus, this feature constructively helps a person be more productive in their daily life.

Another advantage is that it helps in taking calls while driving. Talking on call while driving is however illegal in India. This feature keeps your hands on the steering wheel and not glued to your ear- thus reducing the risk of getting distracted or even getting caught while you are in the middle of a grave emergency. Many states like California have even started allowing hand-free phones while driving.

These earphones provide high quality audio content with perfect bass and treble. This ensures a terrific time for the users.

It is also tough to listen to songs properly in packed streets where cars and vehicles incessantly create a lot of noise. A similar situation is created in gyms and offices. However, a solution is provided by most of the Bluetooth earphones as they come with a noise cancellation feature. It helps in cancelling out other interruptions.

The universality of Bluetooth makes it cheap for manufacturers to implement and develop a wireless earphone. This results in lower costs for the users. Thus, these earphones are extremely inexpensive and affordable.

The last and one of the most important advantages of these earphones is that most of them come with a specific earphone application. This shows the time and location of the place you last used them at. Some of these earphones come with the feature that rings an audible alarm when you connect it with a device or simply activate it. This will help you to find the said earplugs as quickly as possible.…